Well, I suspect I don't understand yet.
Nice picture though - that gives me some idea what you mean.
Do notice that the basic rule of cpu_exclusive cpusets is that their
CPUs don't overlap their siblings. Your Cpusets 1, 2, and 3 seem to be
marked cpu_exclusive in your picture, but all contain the same CPUs 2
and 3, overlapping each other.
I'm guessing what you are trying to draw is:
Tasks on CPUs 0 and 1 have no resource control limits.
Tasks on CPUs 2 and 3 have resource control limits specifying
what percentage of the CPUs 2 and 3 is available to them.
I might draw my solution to that as:
+-----------------------------------+
| |
CPUSET 0 CPUSET 1
sched domain A sched domain B
cpus: 0, 1 cpus: 2, 3
cpu_exclusive=1 cpu_exclusive=1
meter_cpu=0 meter_cpu=0
|
+----------------+----------------+
| | |
CPUSET 1a CPUSET 1b CPUSET 1c
cpus: 2, 3 cpus: 2, 3 cpus: 2, 3
cpu_exclusive=0 cpu_exclusive=0 cpu_exclusive=0
meter_cpu=1 meter_cpu=1 meter_cpu=1
meter_cpu_* meter_cpu_* meter_cpu_*
The meter_cpu_* files in each of Cpusets 1a, 1b, and 1c control what
proportion of the CPU resources in that Cpuset can be used by the tasks
in that Cpuset.
If meter_cpu is false (0) then the meter_cpu_* files do not appear,
which is equivalent to allowing 100% of the CPUs in that Cpuset to
be used by the tasks in that Cpuset (and descendents, of course.)
Don't forget - this all seems like it has significant mission overlap
with CKRM. I hate to repeat this, but the relation of your work to
CKRM needs to be understood before I am likely to agree to accepting
your work into the kernel (not that my acceptance is required; you
really just need Linus to agree, though he of course considers the
positions of others to some inscrutable degree.)
--
I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <[email protected]> 1.925.600.0401
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